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<b>analysis</b>
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<font color="#FF0000">#</font>
Fourier spectral analysis<br>
- press button [FSA]<br>
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<font color="#FF0000">#</font>
Harmonic least squares fit
- press button [LSF]<br>
- when radio button [ellipse] is selected, LSF used 2D data and draws ellipses for the desired frequencies<br>
- frequencies are choosed in file S_config_LSF.m<br>
  - Rayleigh criteria is not applied<br>
  - if performing tidal analysis, the names of tidal constituents can be used 
  if T_TIDE is installed<br>
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<font color="#FF0000">#</font>
T_TIDE
- press button [t_tide]<br>
- similar to LSF, but specific to tidal analysis<br>
  - T_TIDE toolbox must be installed<br>
  - if there is no start time associated with serie being analyses, T_TIDE calculated 
  phases at central time<br>
to avoid this, select [SpectrHA] >> [phases (t_tide)] >> [t=0]<br>
- configuration is done in file S_config_T_TIDE.m<br>
- a part of T_TIDE package is t_predic (tidal prediction); it can be done after a LSF or T_TIDE analysis<br>
cos it uses the output of this routines; start and end time, as well as dt is choosed in the boxes near [predic] button<br>

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